Manuscript, n.d. (18th century?)
Public Domain [tag/del]
Manuscript is in an anonymous hand, whom RISM terms 'Copyist Anon. Sing-Akademie 548'.
These six suites are preserved in a single manuscript source (SA 4581\RISM A 2, 469458100), part of the Sing-Akademie collection returned to Berlin in 2000. Grove's Muffat article (presumably written before 2000) does not list these suites at all.